Care to expand on this? I have LittleSnitch running and, other than trustd reaching out to get new certs, I haven't really seen any "calling home"… Am I missing something?
Some services phoning home;
/System/Library/PrivateFrameworks/PhotoLibraryPrivate.framework/Versions/A/Support/photolibraryd via /System/Library/PrivateFrameworks/PhotoLibraryPrivate.framework/Versions/A/Frameworks/PhotoLibraryServices.framework/Versions/A/XPCServices/com.apple.photomoments.xpc/Contents/MacOS/com.apple.photomoments
I left out a handful that, like trustd, I don't think are worth blocking. A couple on this list I can't find enough documentation on to blindly trust. The photo stuff I'm sure is associated with Photos but I don't want my library's information culled in any way, shape or form and Apple is a huge data mining company now. This brings me to that first service. Now is it tracking our keyboard usage the same way a mobile keyboard app would?
Inquiring minds would like to know... but for now it remains blocked until satisfactorily proven benign.